CN105299825A - Frequency-limiting protection method for air conditioner - Google Patents
Frequency-limiting protection method for air conditioner Download PDFInfo
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- CN105299825A CN105299825A CN201510378052.7A CN201510378052A CN105299825A CN 105299825 A CN105299825 A CN 105299825A CN 201510378052 A CN201510378052 A CN 201510378052A CN 105299825 A CN105299825 A CN 105299825A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a frequency-limiting protection method for an air conditioner. The method comprises the following steps: S1: the air conditioner is started and operated according to a conventional frequency control scheme; S2: the temperature Tf of a frequency conversion module and the environment temperature T4 are detected; S3: the range of the temperature Tf of the frequency conversion module is judged, and if the temperature Tf of the frequency conversion module is greater than the first threshold value and is smaller than or equal to the second threshold value, operation is carried out according to the conventional frequency control scheme and a next step is taken; S4: the difference between the value of the temperature Tf of the frequency conversion module and the valve of the environment temperature T4 is compared with the third threshold value; if the difference between the value of the temperature Tf of the frequency conversion module and the valve of the environment temperature T4 is greater than or equal to the third threshold value and lasts for the scheduled time, operation is carried out according to the conventional frequency control scheme; and if the difference between the value of the temperature Tf of the frequency conversion module and the valve of the environment temperature T4 is smaller than the thread threshold value and lasts for the scheduled time, the scheme is converted to a frequency-limiting protection scheme and operation is carried out. According to the frequency-limiting protection method for the air conditioner, the frequency conversion module is guaranteed to run at a safe temperature, and excellent reliability and safety are achieved.
Description
Technical field
The present invention relates to household appliance technical field, in particular to a kind of limit guard method frequently of air-conditioning.
Background technology
In correlation technique, during operation of air conditioner, the operating temperature of frequency-variable module during the temperature-sensitive bag fault of frequency-variable module, cannot be detected, if system still routinely the limit of multi-connected machine frequently scheme run, the temperature of frequency-variable module can be caused too high, affect the normal operation of air-conditioning.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the limit guard method frequently proposing a kind of air-conditioning.
According to the limit guard method frequently of the air-conditioning of the embodiment of the present invention, comprise the following steps: S1: start shooting and FREQUENCY CONTROL scheme operation routinely; S2: the temperature Tf and the environment temperature T4 that detect frequency-variable module; S3: the scope residing for temperature Tf judging frequency-variable module, if the temperature Tf of described frequency-variable module is greater than described first threshold, and is less than or equal to described Second Threshold, then run according to described nominal frequencies control program and continue next step; S4: compare the temperature Tf-environment temperature T4 of frequency-variable module and the size of the 3rd threshold value; If the temperature Tf-environment temperature T4 of frequency-variable module >=the 3rd threshold value and predetermined hold-time, then FREQUENCY CONTROL scheme is run routinely; If temperature Tf-environment temperature T4 < the 3rd threshold value of frequency-variable module and predetermined hold-time, be then switched to limit frequently protection scheme run.
According to the limit guard method frequently of the air-conditioning of the embodiment of the present invention; whether failure state is in by detecting frequency-variable module temperature-sensitive bag; system is switched between protection scheme frequently in nominal frequencies control program and limit; thus ensure that frequency-variable module runs under safe temperature, improve complete machine reliability of operation and stability.
Preferably, step S3 also comprises: if the temperature Tf of described frequency-variable module is less than or equal to first threshold, be then switched to limit protection scheme operation frequently; If the temperature Tf of described frequency-variable module is greater than Second Threshold, be then switched to limit protection scheme operation frequently.
Preferably, after protection scheme runs the scheduled time frequently by limit, temperature Tf and the environment temperature T4 of frequency-variable module is again detected; The relatively temperature Tf-environment temperature T4 of frequency-variable module and the size of the 4th threshold value; If temperature Tf-environment temperature T4 > the 4th threshold value of frequency-variable module and predetermined hold-time, be then switched to nominal frequencies control program and run; If the temperature Tf-environment temperature T4 of frequency-variable module≤the 4th threshold value and predetermined hold-time, then continue by limit frequently protection scheme run.
Preferably, if the temperature Tf of frequency-variable module is less than or equal to first threshold, then the display element display frequency-variable module temperature-sensitive bag of described air-conditioning disconnects or does not connect.
Preferably, if the temperature Tf of frequency-variable module is greater than Second Threshold, then the display element of described air-conditioning shows frequency-variable module temperature-sensitive bag short circuit or damage.
Preferably, if temperature Tf-environment temperature T4 < the 3rd threshold value of frequency-variable module and predetermined hold-time, then the display element display frequency-variable module temperature-sensitive bag of described air-conditioning and frequency-variable module loose contact.
Preferably, when running under limit frequently protection scheme, the temperature of frequency-variable module is in the safe operating temperature range of frequency-variable module.
Preferably, limit frequency protection scheme comprises the following steps: A1: the temperature Tf detecting frequency-variable module; A2: the operational mode detecting described air-conditioning; If the operational mode of described air-conditioning is heating mode, then obtain current gear and the suction superheat of the interior machine blower fan of described air-conditioning; A3: the scope residing for temperature Tf judging described frequency-variable module, if the temperature Tf of described frequency-variable module is more than or equal to the 5th threshold value, and is less than or equal to the 6th threshold value, then generate the instruction of machine blower fan gear in increasing; A4: judge whether described interior machine blower fan is in most high tap position, if now the current gear of described interior machine blower fan has arrived the most high-grade, then judges whether described suction superheat is more than or equal to the default degree of superheat further; If described suction superheat is more than or equal to the described default degree of superheat, then generate the instruction of the gear reducing described outer machine blower fan; And if described suction superheat is less than the described default degree of superheat, then generates and forbid the instruction that outer machine blower fan downshifts.
Preferably, steps A 3 also comprises: if the temperature Tf of described frequency-variable module is less than or equal to the 7th threshold value, then control described interior machine blower fan and outer machine blower fan with free control mode; If when the temperature Tf of described frequency-variable module is greater than described 7th threshold value and is less than described 5th threshold value, then increase the regularization condition of the described interior machine blower fan of adjustment and described outer machine blower fan.
Preferably, described interior machine blower fan regularization condition is that interior machine blower fan downshift command is forbidden in generation, and the regularization condition of described outer machine blower fan is that outer machine blower fan upshift command is forbidden in generation.
Preferably, steps A 3 also comprises: if the temperature Tf of described frequency-variable module is greater than the 6th threshold value, then generate halt instruction.
Preferably, refer to that the rotating speed of interior machine blower fan and outer machine blower fan can be elevated arbitrarily with the free control mode described interior machine blower fan of control and outer machine blower fan.
Preferably, also comprise: A5: in steps A 2, if the operational mode of described air-conditioning is refrigeration mode, then obtain the current gear of the interior machine blower fan of described air-conditioning; A6: the scope described in temperature Tf judging described frequency-variable module, if the temperature Tf of described frequency-variable module is more than or equal to the 5th threshold value, and is less than or equal to the 6th threshold value, then generate the instruction increasing outer machine blower fan gear; A7: judge whether described interior machine blower fan is in most high tap position, if now the current gear of described interior machine blower fan has arrived the most high-grade, has then generated the instruction of the gear reducing described interior machine blower fan.
Preferably, steps A 6 also comprises: if the temperature Tf of described frequency-variable module is less than or equal to the 7th threshold value, then control described interior machine blower fan and outer machine blower fan with free control mode; If when the temperature Tf of described frequency-variable module is greater than described 7th threshold value and is less than described 5th threshold value, then increase generation and forbid interior machine blower fan upshift command and forbid outer machine blower fan downshift command.
Preferably, steps A 6 also comprises: if the temperature Tf of described frequency-variable module is greater than the 6th threshold value, then generate halt instruction.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the limit guard method frequently according to the air-conditioning of the embodiment of the present invention.
Fig. 2 is the schematic diagram (when air-conditioning is in heating mode) run under limit frequently protection scheme according to the air-conditioning of the embodiment of the present invention.
Fig. 3 is the schematic diagram (when air-conditioning is in refrigeration mode) run under limit frequently protection scheme according to the air-conditioning of the embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
The limit guard method frequently of the air-conditioning of the embodiment of the present invention is described referring to Fig. 1 to Fig. 3.
As shown in Figure 1, according to the limit guard method frequently of the air-conditioning of the embodiment of the present invention, comprise the following steps:
S1) start and routinely FREQUENCY CONTROL scheme run.After air-conditioning start, system default conveniently FREQUENCY CONTROL scheme runs, and wherein nominal frequencies control program refers to that air-conditioning runs in the normal mode, and when running under this scenario, internally the rotating speed of machine blower fan and outer machine blower fan does not carry out forced adjustment.
S2) temperature Tf and the environment temperature T4 of frequency-variable module is detected.By the environment temperature around the temperature of the automatically controlled mainboard detection frequency-variable module of air-conditioning and air-conditioning after a period of time.
S3) judge the scope residing for temperature Tf of frequency-variable module, if the temperature Tf of frequency-variable module is greater than first threshold a, and be less than or equal to Second Threshold b, then conveniently FREQUENCY CONTROL scheme is run and is continued next step.That is, when the temperature of frequency-variable module is in this temperature range, can judge that frequency-variable module is in on-state, the temperature that therefore can continue to compare frequency-variable module with environment temperature to judge whether frequency-variable module temperature-sensitive bag is normally connected further.
S4) the temperature Tf-environment temperature T4 of frequency-variable module and the size of the 3rd threshold value c is compared.Particularly, be greater than first threshold a at the temperature Tf of frequency-variable module, and when being less than or equal to Second Threshold b, conveniently FREQUENCY CONTROL scheme is run, and combining environmental temperature judges whether frequency-variable module temperature-sensitive bag normally connects further afterwards.
If the temperature Tf-environment temperature T4 of frequency-variable module >=the 3rd threshold value c and predetermined hold-time, then continue conveniently FREQUENCY CONTROL scheme and run.Thus, final judgement obtains frequency-variable module temperature-sensitive bag and is in normal operating conditions, and air-conditioning system can conveniently control model be run.
If temperature Tf-environment temperature T4 < the 3rd threshold value c of frequency-variable module and predetermined hold-time, be then switched to limit frequently protection scheme run.
According to the limit guard method frequently of the air-conditioning of the embodiment of the present invention; by detecting frequency-variable module own temperature and environment temperature; judge whether frequency-variable module temperature-sensitive bag is in failure state; system is switched between protection scheme frequently in nominal frequencies control program and limit; thus ensure that frequency-variable module runs under safe temperature, improve complete machine reliability of operation and stability.
Step S3 also comprises: if the temperature Tf of frequency-variable module is less than or equal to first threshold a, be then switched to limit protection scheme operation frequently.Particularly, when the temperature of frequency-variable module is less than or equal to first threshold a, due to the temperature that the temperature of the frequency-variable module detected normally works lower than frequency-variable module, therefore judge that frequency-variable module temperature-sensitive bag is in improper connection status, that is, frequency-variable module is because frequency-variable module temperature-sensitive bag fails normal connection just to cause its heating less, and then own temperature is lower.Like this, because frequency-variable module temperature-sensitive bag is in improper connection status, if continue conveniently FREQUENCY CONTROL scheme to run, the temperature information of frequency-variable module cannot be sent in time the main control unit of complete machine, cannot ensure that the temperature of frequency-variable module is in safety value.Therefore, switch to limit frequency protection scheme in the scenario above, can ensure that the temperature of frequency-variable module is all the time in safety value.
Step S3 also comprises: if the temperature Tf of frequency-variable module is greater than Second Threshold b, be then switched to limit protection scheme operation frequently; If the temperature Tf-environment temperature T4 of frequency-variable module >=the 3rd threshold value c and predetermined hold-time, then FREQUENCY CONTROL scheme is run routinely.In this case, the temperature of frequency-variable module, higher than normal value, now judges that frequency-variable module is in improper connection status, runs frequency-variable module can be made to be that moderate temperature is in safety value under being switched to limit frequency protection scheme.
Further, the limit guard method frequently of air-conditioning, further comprising the steps of: after protection scheme runs the scheduled time frequently by limit, again to detect temperature Tf and the environment temperature T4 of frequency-variable module; If temperature Tf-environment temperature T4 > the 4th threshold value d of frequency-variable module and predetermined hold-time, be then switched to nominal frequencies control program and run; If the temperature Tf-environment temperature T4 of frequency-variable module≤the 4th threshold value d and predetermined hold-time, then continue by limit frequently protection scheme run.
Wherein, if the temperature Tf of frequency-variable module is less than or equal to first threshold a, then the display element display frequency-variable module temperature-sensitive bag of air-conditioning disconnects or does not connect.If temperature Tf-environment temperature T4 < the 3rd threshold value c of frequency-variable module and predetermined hold-time, then the display element display frequency-variable module temperature-sensitive bag of air-conditioning and frequency-variable module loose contact.Operator can shut down according to above-mentioned display result and reconnect frequency-variable module temperature-sensitive bag.
If the temperature Tf of frequency-variable module is greater than Second Threshold b, then the display element of air-conditioning shows frequency-variable module temperature-sensitive bag short circuit or damage.Operator can change or circuit maintenance frequency-variable module temperature-sensitive bag according to this display result.
When the temperature of frequency-variable module is under above-mentioned three kinds of situations, operator can carry out associative operation to keep in repair frequency-variable module temperature-sensitive bag thus to make it be in normal operating conditions to frequency-variable module temperature-sensitive bag according to above-mentioned judged result.
Frequently run under protection scheme because air-conditioning system can switch to limit, and the temperature of frequency-variable module is in the safe operating temperature range of frequency-variable module.Therefore, when not to frequency-variable module temperature-sensitive maintenance packet, still can normal using air-condition, there is better security and convenience.
As shown in Figure 2, during operation of air conditioner, if the temperature-sensitive bag of frequency-variable module lost efficacy, then run under limit frequently protection scheme, wherein limit frequency protection scheme comprises the following steps:
A1) the temperature Tf of frequency-variable module and the operational mode of air-conditioning is detected.
A2) detect the operational mode of described air-conditioning, if the operational mode of air-conditioning is heating mode, then obtain current gear and the suction superheat of the interior machine blower fan of air-conditioning.Wherein, suction superheat refers to the suction superheat at the compressor place of air-conditioning.
A3) judge the scope residing for temperature Tf of described frequency-variable module, if the temperature Tf of frequency-variable module is more than or equal to the 5th threshold value e, and be less than or equal to the 6th threshold value f, then generate the instruction of machine blower fan gear in increasing.That is, as the 5th threshold value e≤Tf≤the 6th threshold value f, the temperature super safe temperature of frequency-variable module, if interior machine blower fan does not arrive the most high-grade, the instruction then generating machine gear in increasing increases by one grade to make interior machine blower fan on the basis of original gear, increases the rotating speed of interior machine blower fan, strengthens the heat radiation of air-conditioning thus, reduce the energy loss of complete machine, and then the temperature of frequency-variable module is minimized.
A4) judge whether described interior machine blower fan is in most high tap position, if the current gear of machine blower fan has arrived the most high-grade now, then judge whether suction superheat is more than or equal to the default degree of superheat further.That is, when the rotating speed of interior machine blower fan can not raise again, by reducing the rotating speed of outer machine blower fan to reduce the energy consumption of complete machine, and then reach the object reducing frequency-variable module temperature further.
If suction superheat is more than or equal to the default degree of superheat, then generate the instruction of the gear reducing outer machine blower fan.That is, when suction superheat is more than or equal to the default degree of superheat, the rotating speed of outer machine blower fan can be reduced.
If suction superheat is less than the default degree of superheat, then generates and forbid the instruction that outer machine blower fan downshifts.That is, if suction superheat is less than the default degree of superheat, then allow outer machine blower fan to upshift or gear constant.
Like this, during air-conditioning work when the temperature-sensitive bag of frequency-variable module lost efficacy, system is run by above-mentioned guard method to accelerate the rotating speed of interior machine blower fan in a heating mode to accelerate air-conditioning heat dissipation speed, reduce the rotating speed of outer machine blower fan to reduce the energy loss of air-conditioning, thus the temperature of frequency-variable module in air-conditioning is reduced in safety value, improves the reliability and stability of system cloud gray model; And; may occur under considering heating mode that suction superheat is too low and affect the normal operation problem of air-conditioning heating circulation; suction superheat is detected; when it is greater than the default degree of superheat, can implement to reduce the operation of outer machine rotation speed of fan, when it is less than the default degree of superheat; outer machine rotation speed of fan is not allowed to reduce; to avoid suction superheat to reduce with the reduction of outer machine rotation speed of fan, ensureing, on the basis that air-conditioning normally runs, to reach the effect of protection frequency-variable module thus.
Further, steps A 3 also comprises: if when the temperature Tf of frequency-variable module is greater than the 7th threshold value g and is less than the 5th threshold value e, then increase the regularization condition of machine blower fan and outer machine blower fan in adjustment; If the temperature Tf of frequency-variable module is less than or equal to the 7th threshold value g, then machine blower fan and outer machine blower fan in controlling with free control mode.
Particularly, the regularization condition of interior machine blower fan is that interior machine blower fan downshift command is forbidden in generation, and the regularization condition of outer machine blower fan is that outer machine blower fan upshift command is forbidden in generation.That is, when the temperature of frequency-variable module is greater than the 7th threshold value g and is less than the 5th threshold value e, be easy to exceed safety value although the temperature of frequency-variable module is in safety value.Now, generation is forbidden interior machine blower fan downshift command and is forbidden the outer machine blower fan upshift command of outer machine blower fan, only allow the gear of machine blower fan in system increase or keep interior machine blower fan gear constant, and only allow the rotating speed of the outer machine blower fan of reduction or keep the rotating speed of outer machine blower fan constant.Thus, apply regularization condition by the rotational speed regulation of internal machine blower fan and outer machine blower fan, do not raise with the temperature controlling frequency-variable module, and then make frequency-variable module be that temperature maintains in safety value.
Particularly, refer to that the rotating speed of interior machine blower fan and outer machine blower fan can be elevated arbitrarily with machine blower fan and outer machine blower fan in free control mode control.That is, when the temperature of frequency-variable module is less than or equal to the 7th threshold value g, frequency-variable module temperature now is not only within the scope of safety value, and the adjustment in short-term of interior machine blower fan and outer machine rotation speed of fan can not make the temperature of frequency-variable module exceed safety value.
In certain embodiments, steps A 3 also comprises: if the temperature Tf of frequency-variable module is greater than the 6th threshold value f, then generate halt instruction.That is, when the temperature of frequency-variable module is greater than the 6th threshold value f, the temperature of frequency-variable module is too high, has exceeded system adjustable joint category, has therefore generated halt instruction, controlled air conditioner and shut down.
Wherein, every the scheduled time, detect the temperature Tf of frequency-variable module and the operational mode of air-conditioning and judge the scope residing for temperature of frequency-variable module, and the scope residing for it sends command adapted thereto.
As shown in Figure 3, also comprise: A5: in steps A 2, if the operational mode of air-conditioning is refrigeration mode, then obtain the current gear of the interior machine blower fan of air-conditioning; A6: the scope described in temperature Tf judging described frequency-variable module, if the temperature Tf of frequency-variable module is more than or equal to the 5th threshold value e, and is less than or equal to the 6th threshold value f, then generate the instruction increasing outer machine blower fan gear; If the current gear of machine blower fan has arrived the most high-grade now, then generate the instruction of the gear of machine blower fan in reducing.That is, when air-conditioning runs in cooling mode, if when the temperature of frequency-variable module is more than or equal to the 5th threshold value e and is less than or equal to the 6th threshold value f, the rotating speed improving outer machine blower fan and/or the rotating speed reducing interior machine blower fan just can be accelerated the heat radiation of air-conditioning, reduce the energy consumption of air-conditioning, and then reduce the temperature of frequency-variable module, make it be in safety value.
Thus, during air-conditioning work when the temperature-sensitive bag of frequency-variable module lost efficacy, system is run by above-mentioned guard method to accelerate the rotating speed of outer machine blower fan in cooling mode to accelerate air-conditioning heat dissipation speed, in reducing, the rotating speed of machine blower fan is to reduce the energy loss of air-conditioning, thus the temperature of frequency-variable module in air-conditioning is reduced in safety value, improves the reliability and stability of system cloud gray model; And the preferential rotating speed regulating interior machine blower fan, enhances the radiating rate of condenser, better reduces the energy consumption of air-conditioning, reaches the effect reduced in frequency-variable module temperature value safety value.
Further, steps A 6 also comprises: if the temperature Tf of frequency-variable module is less than or equal to the 7th threshold value g, then machine blower fan and outer machine blower fan in controlling with free control mode; If when the temperature Tf of frequency-variable module is greater than the 7th threshold value g and is less than the 5th threshold value e, then increase the regularization condition of machine blower fan and outer machine blower fan in adjustment.
Wherein, interior machine blower fan regularization condition is that interior machine blower fan upshift command is forbidden in generation, and the regularization condition of outer machine blower fan is that outer machine blower fan downshift command is forbidden in generation.That is, when the temperature Tf of frequency-variable module is greater than the 7th threshold value g and is less than the 5th threshold value e, although the temperature of frequency-variable module is in safety value, but interior machine rotation speed of fan rises or outer machine rotation speed of fan declines may make the temperature of frequency-variable module exceed safety value, therefore, sending and forbid interior machine blower fan upshift and forbid the instruction that outer machine downshifts, is that temperature is controlled in safety value to make frequency-variable module.
In certain embodiments, steps A 6 also comprises: if the temperature Tf of frequency-variable module is greater than the 6th threshold value f, then generate halt instruction.That is, when the temperature of frequency-variable module is greater than the 6th threshold value f, the temperature of frequency-variable module is too high, has exceeded system adjustable joint category, has therefore generated halt instruction, controlled air conditioner and shut down.
No matter real in cooling mode or in a heating mode, after sending upshift command, corresponding rotation speed of fan raises one grade or many grades, after sending downshift command, corresponding rotation speed of fan reduces a gear or many grades.Interior machine blower fan refers to the blower fan of indoor set, and outer machine blower fan refers to the blower fan of off-premises station.Wherein, in cooling mode, interior machine blower fan refers to the blower fan at evaporimeter place, and outer machine blower fan refers to the blower fan at condenser place; In a heating mode, interior machine blower fan refers to the extension set at condenser place, and outer machine blower fan refers to the blower fan at evaporimeter place.
Be appreciated that; the guard method of air-conditioning frequency-variable module in cooling mode and air-conditioning frequency-variable module are in a heating mode that guard method can be applied on same air-conditioning jointly; to be undertaken adjusting, monitoring by internal machine blower fan and outer machine rotation speed of fan; realize the cooling to frequency-variable module, and then ensure that frequency-variable module temperature is in safety value all the time under the prerequisite that frequency-variable module temperature-sensitive bag lost efficacy.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (15)
1. a limit guard method frequently for air-conditioning, is characterized in that, comprise the following steps:
S1: start shooting and FREQUENCY CONTROL scheme operation routinely;
S2: the temperature Tf and the environment temperature T4 that detect frequency-variable module;
S3: the scope residing for temperature Tf judging frequency-variable module, if the temperature Tf of described frequency-variable module is greater than described first threshold, and is less than or equal to described Second Threshold, then run according to described nominal frequencies control program and continue next step;
S4: compare the temperature Tf-environment temperature T4 of frequency-variable module and the size of the 3rd threshold value;
If the temperature Tf-environment temperature T4 of frequency-variable module >=the 3rd threshold value and predetermined hold-time, then FREQUENCY CONTROL scheme is run routinely;
If temperature Tf-environment temperature T4 < the 3rd threshold value of frequency-variable module and predetermined hold-time, be then switched to limit frequently protection scheme run.
2. the limit guard method frequently of air-conditioning according to claim 1, it is characterized in that, step S3 also comprises:
If the temperature Tf of described frequency-variable module is less than or equal to first threshold, be then switched to limit protection scheme operation frequently;
If the temperature Tf of described frequency-variable module is greater than Second Threshold, be then switched to limit protection scheme operation frequently.
3. the limit guard method frequently of air-conditioning according to claim 1 and 2, is characterized in that, after protection scheme runs the scheduled time frequently by limit, again detects temperature Tf and the environment temperature T4 of frequency-variable module;
The relatively temperature Tf-environment temperature T4 of frequency-variable module and the size of the 4th threshold value; If temperature Tf-environment temperature T4 > the 4th threshold value of frequency-variable module and predetermined hold-time, be then switched to nominal frequencies control program and run;
If the temperature Tf-environment temperature T4 of frequency-variable module≤the 4th threshold value and predetermined hold-time, then continue by limit frequently protection scheme run.
4. the limit guard method frequently of air-conditioning according to claim 2, is characterized in that, if the temperature Tf of frequency-variable module is less than or equal to first threshold, then the display element display frequency-variable module temperature-sensitive bag of described air-conditioning disconnects or do not connect.
5. the limit guard method frequently of air-conditioning according to claim 2, is characterized in that, if the temperature Tf of frequency-variable module is greater than Second Threshold, then the display element of described air-conditioning shows frequency-variable module temperature-sensitive bag short circuit or damage.
6. the limit guard method frequently of air-conditioning according to claim 1; it is characterized in that; if temperature Tf-environment temperature T4 < the 3rd threshold value of frequency-variable module and predetermined hold-time, then the display element display frequency-variable module temperature-sensitive bag of described air-conditioning and frequency-variable module loose contact.
7. the limit guard method frequently of air-conditioning according to claim 1, is characterized in that, when running under limit frequently protection scheme, the temperature of frequency-variable module is in the safe operating temperature range of frequency-variable module.
8. the limit guard method frequently of the air-conditioning according to any one of claim 1-7, is characterized in that, limit frequently protection scheme comprises the following steps:
A1: the temperature Tf detecting frequency-variable module;
A2: the operational mode detecting described air-conditioning; If the operational mode of described air-conditioning is heating mode, then obtain current gear and the suction superheat of the interior machine blower fan of described air-conditioning;
A3: the scope residing for temperature Tf judging described frequency-variable module, if the temperature Tf of described frequency-variable module is more than or equal to the 5th threshold value, and is less than or equal to the 6th threshold value, then generate the instruction of machine blower fan gear in increasing;
A4: judge whether described interior machine blower fan is in most high tap position, if now the current gear of described interior machine blower fan has arrived the most high-grade, then judges whether described suction superheat is more than or equal to the default degree of superheat further;
If described suction superheat is more than or equal to the described default degree of superheat, then generate the instruction of the gear reducing described outer machine blower fan; And
If described suction superheat is less than the described default degree of superheat, then generates and forbid the instruction that outer machine blower fan downshifts.
9. the limit guard method frequently of air-conditioning according to claim 8, it is characterized in that, steps A 3 also comprises:
If the temperature Tf of described frequency-variable module is less than or equal to the 7th threshold value, then control described interior machine blower fan and outer machine blower fan with free control mode;
If when the temperature Tf of described frequency-variable module is greater than described 7th threshold value and is less than described 5th threshold value, then increase the regularization condition of the described interior machine blower fan of adjustment and described outer machine blower fan.
10. the limit guard method frequently of air-conditioning according to claim 9, it is characterized in that, described interior machine blower fan regularization condition is that interior machine blower fan downshift command is forbidden in generation, and the regularization condition of described outer machine blower fan is that outer machine blower fan upshift command is forbidden in generation.
The limit guard method frequently of 11. air-conditionings according to claim 8, it is characterized in that, steps A 3 also comprises:
If the temperature Tf of described frequency-variable module is greater than the 6th threshold value, then generate halt instruction.
The limit guard method frequently of 12. air-conditionings according to claim 9, is characterized in that, refers to that the rotating speed of interior machine blower fan and outer machine blower fan can be elevated arbitrarily with the free control mode described interior machine blower fan of control and outer machine blower fan.
The limit guard method frequently of 13. air-conditionings according to claim 8, is characterized in that, also comprise:
A5: in steps A 2, if the operational mode of described air-conditioning is refrigeration mode, then obtains the current gear of the interior machine blower fan of described air-conditioning;
A6: the scope described in temperature Tf judging described frequency-variable module, if the temperature Tf of described frequency-variable module is more than or equal to the 5th threshold value, and is less than or equal to the 6th threshold value, then generate the instruction increasing outer machine blower fan gear;
A7: judge whether described interior machine blower fan is in most high tap position, if now the current gear of described interior machine blower fan has arrived the most high-grade, has then generated the instruction of the gear reducing described interior machine blower fan.
The limit guard method frequently of 14. air-conditionings according to claim 13, it is characterized in that, steps A 6 also comprises:
If the temperature Tf of described frequency-variable module is less than or equal to the 7th threshold value, then control described interior machine blower fan and outer machine blower fan with free control mode;
If when the temperature Tf of described frequency-variable module is greater than described 7th threshold value and is less than described 5th threshold value, then increase generation and forbid interior machine blower fan upshift command and forbid outer machine blower fan downshift command.
The limit guard method frequently of 15. air-conditionings according to claim 14, it is characterized in that, steps A 6 also comprises: if the temperature Tf of described frequency-variable module is greater than the 6th threshold value, then generate halt instruction.
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